Hinge.



'Nm-883,998. f PATENTED APR.7,1908.

ma. WINTER.

HINGE.

APPLIUATIOH FILED JUH 9. 1905.

PATENT OFFICE.

RUDOLPH G. WINTER, OF MILWAUKEE, WISCONSIN.

HINGE.

To all whom t may concern:

Beit known that I, RUDOLPH G. WINTER, of Milwaukee, Wisconsin, have invented certain Improvements in Hinges, of which the following is a specification.

This invention is an improved form of'the gravity hinge described and claimed in m atent No. 785,143, granted March 21, 1905, and partly also as described in my concurrent application No. 255,897, filed April 17, 1905.

The object of my present invention is to construct the hin e so that it will run more easily and friction essly than the hinges previously invented, by so arranging the camsurfaces that they shall be set apart at a distance from the pintle or pivot of the hinge, and in other ways as will be understood from the following description.

My invention consists of the construction and combinations hereinafter described and pointed out in the claims.

Referring to the drawings hereto annexed Figure Fis a front elevation of a hinge ern-v bodying my improvements, in the closed of sition of the door to which it is attached, ig. 2 is an elevation of the same in a plane at right angles to that of Fig. 1, Fig. 3 is a side view similar to Fig. 2 but showing the swin ing leaf of the hinge opened throu h an angle of about 100 degrees. Figs. 4 an 5 are plan views of the same, the hinge being shown in a closed position and in a position of opening of about 120 degrees, respectively.

In these drawings every reference character designates always the same part.

In the form of hinge shown there are two leaves A and B, of which in the position shown the leaf A is fixed and the vleaf B attached to the door, but by reversing the position of the hinge' the leaf A might be "at- 'd tached to the door and the leaf B fixed. The leaf A comprises a plate 11 having screwholes 12 for attachment to the face of the door-jamb, and apair of intle lugs 13, 14

rojecting at right angles t ereto at top and ottom. The leaf B is likewise comprised of a plate 15 having screw-holes 16 for attachment to the face of the door and a single central pintle-lug 17. The intle-lugs 13, 14 and 17 are connected by t e pintle 18 of the hinge, which passes throu h perforations therein as usual. This pintle as its head 19 flattened at one side as shown at 20, and a projection 21 projects upwardly from the pintle-lug 13 against the Hat portion 20 to Specification of Letters Patent. Application filed .Tune 9, 1905,.

Patented April 7, 190s. serial No; 264,396.

I prevent the pintle from turning in its socket with respect to the fixed leaf A. The pro jection 21 on.its flat side 22 is preferably somewhat undercut as shown, to prevent the pintle from rising when the door is opened. As will be observed the lug 17 does not fill the entire spacebetween the lugs 13 and 14, but moves up and down between them, and is provided in the first form of the hin e with a radially projecting cam-lu 23, t is lug having preferably a trapezoida cross-section, as seen from Fig. 2, composed of two downwardly and inwardly sloping faces and a horizontal face 26. The leaf A, on the other hand, has between the lugs 13 and 14 and artly surrounding the lug 17, a semicircu ar lug 27 having an upwardly sloping and generally helicoidal cam-surface'28 on which the lug 23 rests. I refer to make this cani-.surface not of a un' orm slope, but at its upper end 29 more steeply pitched than below, and likewise at its lower end 30, whereon the lug 23 rests in the closed position of the door. Beyond the end of the cam-surface 28 there is preferably formed on the lug 27 another cam-surface 31, which is steeply pitched in the oppositev direction, land which coacts with the surface 25 of the This hinge operates as follows: When the door is opened the lug 23 rises on the camsurface 28 raising the swinging leaf B and the doorl` with it. Should the door be released before the lug 23 reaches the top of the camsurface, the, steeper por-tion 29 will give an increased accelerationto the door as it starts Ato close, and likewise, should the door be ref leased when opened only a few inches the in. creased pitch of the ar-t 30 of the cam-sur face will act with sufficient force to close the oor. Again, should it be desired to have the door remain in an is o cned until the horizontal portion 26 of the llug 23 rests on the top edge 32 of the lug 27, in which case there is no tendenc to o en or close thedoor and should it be desired) to hold the door open ositively, it is swung still further until the ug 23 rests on the surface 31, in .which case the door is swung wide open and held in that position until forcibly closed.

The form of hinge shown herein offers suerior advantages over those shown in my orrner applications principally on account of the, greater ease of o eration. By reason of l the coperating sur aces being placed at a either 24 and 25,

open position, the door distance from the pintle, the turning force exerted by the hinge is greater with a given slope by reason of the longer lever-arm, and therefore, a smaller slope 1s necessary to accomplish the same effect, and conversely a greater effect can be produced to open or shut the door with the available amount of slope.

In revious forms of hinge it was necessary to' ma Ce the slo e of the surface so great that it approached the angle of repose of the rubbin surfaces, so that the amount of friction an consequently the strain upon the hinges was very great in Vopening the door, and the rotating effect was less in shutting. When the cam-surfaces are set at a distance from the pintle as herein, slight irregularities or lack of smoothness of the surfaces are of less importance, and the smoothness of operation is increased in much more than a simple proportion.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a hinge, the combination of a pair of leaves, a pintle pivotally connecting them and having a head one side of which is cut away to form a flat side, and a projection on one of said leaves opposite said flat side, whereby the pintle is prevented from rotating with the opposite leaf.

2. In a hinge, the combination of a pair of leaves, `a pintle pivotally connecting them and having a head one side of which is cut away to form a fiat side, and a projection having an overhanging surface on one hingeleaf opposite said flat side, and adapted to prevent the other from rotating the pintle and to restrain it from rising vertically.

3. In a gravity-acting hinge, the combination of a pintle havin a head. and a flat side formed on one side t ere'of, a pintle-lug in which said pintle is mounted, and a projection on the outer side of said lug projecting against the fiat side on said head. y

4. A door-hinge comprising, in combination, a pair of leaves each having a flat portion rovided with means for securing it to the at side of the door or door-j amb, one of said leaves having .on the upper and lower ends thereof pintle-1u s projecting outwardly at r' ht angles to saidg flat portion and perforate to receive a intie. the other leafhaving on one edge in the center thereof a single intle-lug projecting at ri ht angles to said at portion and also pe orated to receive the pintle, a pintle passing through said lugs forming a pivot for the two leaves, a semicircularly curved cam-lug on said first named hinge-leaf between the two pintle-lugs thereof and substantially bisected by the plane thereof, said cam-lug having a continuous helicoidal carn-surface, the end ortions of which are pitched. more steeply t an the intermediate portion, and a projection or lug on the intle-lug of the other hinge-leaf substantia y at right angles to said pintle-lug, whereby it rests on the lower portion of said camesurface when the two hinge-leaves are closed together.

5. A door-hinge comprising, in combination, a pair of leaves each having a flat portion rovided with means for securing it to the at side of the door or door-j amb, one of said leaves having on the upper and lower ends thereof intle-lugs rojecting outwardly at right ang es to said flat portion and erforated to receive a pintle, the other eaf having on one edge in the center thereof a sin le pintle-lug projecting at right angles to sai flat portion and also perforated to receive the pintle, a pintle passing through said lugs forming a pivot for the two leaves, a semicircularly curved cam-lug on said first named hinge-leaf between -the two pintlelugs thereof and substantially bisected by the plane thereof, said cam-lug having a continuous helicoidal cam-surface, the end ortions of which are pitched more steeply t an the intermediate portion, and a proj ecton or lug on the pintleug `of the other hinge leaf at right angles to said pintle-lug whereby it rests on the lower portion of said cam-surface when the two hinge leaves are closed toether; the upper portion of said semicircuar lug having at its free end a downwardly sloping'surface in position for the other lug to rest thereon in the wide open position of the hinge.

In testimony whereof, I have hereunto set my hand this seventh day of June, 1905.

RUDOLPH G. WINTER. In presence of* GERTRUDE H. BOINK, GEORGE WETMORE CoLLEs. 

